The virus of poliomyelitis, one of the smallest disease-causing organisms, is less than a millionth of an inch long. Trying to follow this minute invader as it attacks the nerve cells in the brain and spinal cord has long been a baffling problem for polio researchers. Last week two Yalemen, Drs. Joseph L. Melnick and John B. LeRoy, told how they had used the electron microscope to study this microcosmic warfarewith surprising results.
Most cytologists (cell scientists) had believed that the virus multiplies in the protoplasm which surrounds the nerve cell's nucleus, much...
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